A 22-year-old female college student is shocked to receive a diagnosis of myasthenia gravis. What are the etiology and most likely treatment for her health problem?
A. A decline in functioning acetylcholine receptors; treatment with corticosteroids and intravenous immunoglobulins
B. Cerebellar lesions; surgical and immunosuppressive treatment
C. Excess acetylcholinesterase production; treatment with thymectomy
D. Autoimmune destruction of skeletal muscle cells; treatment with intensive physical therapy and anabolic steroids